feat: replace Kaggle CSV with Wikipedia scraper for historical match data

Add scripts/scrape-wikipedia.ts that fetches all 22 World Cups (1930–2022)
from English Wikipedia via MediaWiki API, handles group sub-pages, AET/penalty
detection, and goal parsing, writing openfootball-format JSON to app/data/openfootball/.

Rewrite scripts/seed.ts to read these local JSON files instead of the Kaggle
CSV, producing 965 matches and 2716 goals with per-group assignments for all
historical tournaments (enabling group standings on tournament pages).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/data/openfootball/1974/worldcup.stadiums.json

@@ -0,0 +1,36 @@
+{
+  "stadiums": [
+    {
+      "name": "Olympiastadion",
+      "city": "Munich"
+    },
+    {
+      "name": "Volksparkstadion",
+      "city": "Hamburg"
+    },
+    {
+      "name": "Waldstadion",
+      "city": "Frankfurt"
+    },
+    {
+      "name": "Westfalenstadion",
+      "city": "Dortmund"
+    },
+    {
+      "name": "Parkstadion",
+      "city": "Gelsenkirchen"
+    },
+    {
+      "name": "Niedersachsenstadion",
+      "city": "Hanover"
+    },
+    {
+      "name": "Rheinstadion",
+      "city": "Düsseldorf"
+    },
+    {
+      "name": "Neckarstadion",
+      "city": "Stuttgart"
+    }
+  ]
+}